In this paper, the characteristics of water vapor transport at different heights during the process of precipitating inJinhua area quantitatively were analyzed, by using the local precipitation data from January to December in 2017 and globalreanalysis at the same period. At the same time, the HYSPLIT trajectory model and GrADS weather model were introduced. Theresults of the study are as follows: (1) There are difference in the sources of water vapor and migration pathways at different timein the study area. The monthly water vapor change process is closely related to the winter and summer monsoons. In addition, thewater vapor transportation from April to May is characterized by the transition between winter and summer monsoons; fromSeptember to October, it is the transition period of summer and winter monsoons. (2) The water vapor channel in the study areacan be roughly divided into four categories: the West Pacific channel, Bengal Bay channel South China Sea channel, Eurasia andlocal channel. In addition, there is difference in water vapor transport channels and contribution rates at the various heights in thestudy area during the winter and summer.